UZH Brain Scan Study | Hypnotherapy Research | Clear Minds

For as long as hypnotherapy has existed, sceptics have asked the same question: is it real, or is it just the power of imagination? In February 2025, neuroscientists at the University of Zurich (UZH) answered that question with some of the most rigorous brain-imaging data ever collected on the hypnotic state — and the results were unambiguous.

What the University of Zurich Researchers Did

A team led by neuroscientists Philipp Stämpfli, Nuno Prates de Matos, and Mike Brügger conducted three separate but identically designed studies, each using a different imaging technology: functional MRI (fMRI), EEG, and magnetic resonance spectroscopy (MRS). Across all three studies, just over 50 healthy, hypnosis-experienced participants were scanned at two distinct depths of hypnosis — a mild state (somnambulism) and a very deep state (the Esdaile state).

The researchers describe the project as the first of its kind in the world to be this standardised and multimodal. Rather than relying on self-report alone, they could cross-verify the same biological event through three independent scientific lenses simultaneously.

What They Found in the Brain

The findings were striking across every imaging method:

• fMRI results: Hypnosis produced measurable changes in the large-scale functional networks of the brain — specifically in cortical regions governing attention and bodily awareness. Connectivity patterns shifted clearly between the waking state and both levels of hypnosis.
• EEG results: Theta brainwaves — associated with deep relaxation, meditation, and hypnagogic states — increased significantly at both levels of hypnosis. Importantly, participants were not asleep; they reported being deeply relaxed yet highly focused.
• MRS results: Neurochemical changes were detected in specific brain areas, including an increased release of myo-inositol during deep hypnosis, pointing to real biochemical shifts, not just altered perception.
• Physiological markers: Heart rate and breathing both slowed, consistent with a genuine parasympathetic, restorative state.

The researchers were also able to scientifically distinguish between the two depths of hypnosis for the first time — something that had been debated in professional circles for decades without hard evidence.

Why This Finding Matters

Dr Stämpfli stated clearly: "The hypnotic effect is neither invented nor feigned." That single sentence carries enormous weight.

For decades, hypnotherapy has had to battle the perception that it works only on the highly suggestible, or that any benefits are purely placebo. This research dismantles that argument at the neurobiological level. When a person enters hypnosis, their brain objectively enters a different functional state — one that is measurably distinct from both normal wakefulness and sleep.

The theta-wave surge is particularly interesting. The same brainwave signature is seen during deep meditation, flow states, and the edge of sleep — all conditions associated with heightened receptivity, reduced self-referential chatter, and accelerated learning. This helps explain why hypnotherapy is so effective at embedding new thought patterns and behaviours: the brain is physiologically primed to receive them.

The study also opens important questions the researchers intend to pursue: specifically, why does this altered brain state have therapeutic effects on conditions such as anxiety, pain, and insomnia? The mechanisms are becoming clearer, but the full picture is still being mapped.

How Clear Minds Uses This State

Every session in the Clear Minds app is designed to guide you into exactly the state the UZH researchers measured — that deeply relaxed, highly focused zone where the mind is open and receptive to positive change.

The sessions use carefully crafted audio to bring your brainwaves down into the theta range, quiet the conscious mind's resistance, and deliver therapeutic suggestions directly to the subconscious. Whether you are working on anxiety, sleep, confidence, or breaking a habit, the underlying mechanism is the same: a real, brain-level shift that science can now see and measure.

The UZH team noted that their subjects reported feeling a profound loss of perception of space and time, yet remained mentally alert and far from sleep. Clear Minds users describe exactly this — a deeply restful trance that somehow feels more productive than an ordinary nap, because the brain is actively reorganising, not simply resting.

The Bottom Line

The University of Zurich study is a landmark moment for hypnotherapy. It moves the field from anecdote and clinical outcome data into hard neuroscience. Hypnosis is a measurable, distinct brain state — and the therapeutic window it creates is real.

If you have been curious about hypnotherapy but unsure whether it is genuinely different from relaxation or positive thinking, this research gives you a clear answer: it is. And Clear Minds puts that evidence-backed state in your pocket, available any time you need it.

Try Clear Minds free today and experience the brain state that neuroscience has confirmed.